Adjust The Force; How And When To Adjustthe Forces - Craftsman 139.53925DS Manual Del Propietário

ADJUSTMENT STEP 2
Adjust the Force
Force adjustment controls are located on the back panel
of the motor unit,.Force adjustment settings regulate the
amount of power required to open and close the door.
If the forces are set too light, door travel may be
interrupted by nuisance reversals in the down direction
and stops in the up direction.. Weather conditions can
affect the door movement, so occasional adjustment may
be needed..
The maximum force adjustment range is about 3/4 of a
complete turn. Do not force controls beyond that
point. Turn force adjustment controls with a screwdriver.
NOTE: ff anything interferes with the door's upward travel,
it will stop., ff anything interferes with the door's downward
travel (including binding or unbalanced doors), it will
reverse..
Without a properlyinstalled safety reversalsystem, persons
(particularlysmall children) could be SERIOUSLY INJURED or
KILLEDby a closing garagedoor,.
° Too much force on garagedoor will interfere with proper
operationof safetyreversal system..
- NEVER increaseforce beyondminimum amount requiredto
close garagedoor,
° NEVER useforce adjustmentsto compensate for a binding
or sticking garagedoor..
• If one control (force or travel limits) is adjusted,the other
control may also needadjustment..
- After ANYadjustmentsare made,the safety reversalsystem
MUSTbe tested. Door MUSTreverseon contact with 1-1/2"
high (3.8 cm) object (or 2x4 laid flat) on floor.
HOW AND WHEN TO ADJUSTTHE FORCES
1.Test the DOWN (close) force
• Grasp the door bottom when the door is about halfway
through DOWN (close) travel,.The door should
reverse° Reversal halfway through down travel does
not guarantee reversal on a 1-1/2" (3..8cm) obstruction.
See Adjustment Step 3, page 29. if the door is hard
to hold or doesn't reverse, DECREASE the DOWN
(cfose) force by turning the control counterclockwise..
Make small adjustments until the door reverses
normally. After each adjustment, run the opener
through a complete cycle..
oIf the door reverses during the down (close) cycle
and the opener lights aren't flashing, INCREASE
DOWN (close) force by turning the control clockwise.
Make small adjustments until the door completes a
close cycle.. After each adjustment, run the opener
through a complete travel cycle. Do not increase the
force beyond the minimum amount required to close
the door.
2. Test the UP (open) force
• Grasp the door bottom when the door is about halfway
through UP (open) travel..The door should stop. If the
door is hard to hold or doesn't stop, DECREASE
UP (open) force by turning the control
counterclockwise. Make small adjustments until the
door stops easily and opens fully. After each
adjustment, run the opener through a complete travel
cycle,
, If the door doesn't open at least 5 feet (1.5 m),
INCREASE UP (open) force by turningthe control
clockwise.. Make small adjustments until door opens
completely. Re-adjust the UP limit if necessary. After
each adjustment, run the opener through a complete
travel cycle,.
Force Adjustment
Conlrols
Back Penet 1\_
1 I \ I
ADJUSTMENT LABEL
Open Force
Close Force
28